Reciprocating blade for carry-type scraper



TYPE SCRAPER 2 SHEETS SHEET 1 G. R. M INTOSH RECIPROCATING BLADE FORCARRY- Filed Jan. 16, 1948 H w T m N n E G R 0 E 6 A TTORNEY Dec. 2,1952 G. R. M INTOSH RECIPROCATING BLADE FOR CARRY-TYPE SCRAPER FiledJan. 16, 1948 2 SHEETS--SHEET 2 1 78 iii-.1 v9

INVENTOR. GEORGE R. M0 INTOSH ATTORNEY Patented Dec. 2, 1952 UNITEDSTATES PATENT OFFICE RECIPROCATING- BLADE FOR CARRY-TYPE SCRAPER-GeorgeR. McIntosh, Oakland, Calif.

Application January 16, 1948, Serial No. 2,631

2 Claims.

This invention relates to loading devices for Scrapers.

An object. of the invention is to provide a device for loading scrapers.in hard ground in such amanner, as to reduce'the need for tractor power.Gustomarily scrapers in hard ground are pulled, drawn or pushed. It isan object of this inventionto provide a means to facilitate the loadingof the. scrapers to. such an extent as to totally obviatetheneed for thepusher tractor.

Another object of this invention is to provide a scraper bladeassociated with the bottom of a scraper in such amanner-that. it has amovement independently of the. remaining portions of the scraper forbreaking up the hard ground or soil and thereby facilitate the loadingof the scraper.

Particularly it. is a featurev of my invention to produce a motion orvibration of the scraper blade atthe bottom of the scraper in such amannor that it breaks up the hard ground in front of the bowl of thescraper and thereby facilitates the scraping and loading; this motion ofthe blade may be independent of the bottom of the scraper or it may bemovable with the bottom of the, scraper or in some instances the entirebowl. may be, vibrated, various types of devicesmay be provided to movethe bottom or the blade, and. the bottom in various desired manners.Eorinstance. the blade may-be reciprocated back andforth or with thedirection of movement or main axis of the scraper; on the other hand thescraper may be reciprocated transversely with respect of the scraperbottom; or it may be reciprocated with a quasi-circular or other complexmovement, according to the movin mechanisms that are applied to. suchscraper blades and devices ofithis type.

I am aware that some changes may be made in the general arrangements andcombinations of the several devices and parts, as well as in the detailsof the construction thereof without departing from the scope of thepresent invention as set forth in the appended specification, and asdefined in the following claims; hence I do not limit my invention tothe exact arrangements and. combinations of the said device and partsas. described in the said specification, nor do I confine myself to theexact details of the construction of the said parts as illustrated inthe accompanying drawings.

With the foregoing and other objects in view, which will be mademanifest in the following detailed,description, reference is had to theaccompanying drawings for. the illustrative embodimentof the-invention,wherein;

Fig. 1 is a top plan view of. an embodiment. of my invention.

Fig. 2 is a partly sectional side View of said embodiment of myinvention.

Fig. 3 is a side view of a, modified embodiment. of the invention.

Fig. 4. is a plan view of another modified em.- bodiment of theinvention.

Fig. 5 is a side view, partly in section of the embodiment shown inFig.4.

Fig. 6 is. a fragmental detail view'of said. last. modified form.

Figs. '7 and 8 are other'modified embodiments. of the invention.

There are atthe present various types of scrap.- ers in use, one of themain, qualities, of all of which is that it must be self-loading andpreferably self-hauling; and self-spreading. In other words a highlymaneuverable scraper bowl must. be used which as it scrapes the groundit fills the. bowl and when neecessary it can lift. the scraper off theround and haul the loaded earth away to a suitable place for spreadingor dumping. In hard ground or similar typev of difficult workingconditions it may be necessary to have a pusher tractor to provide thenecessary power for scrap.- ing the earth and for loading it into thebowl.

In carrying out my invention I make. use of a scraper bowl I which ispivotally supportedon a framework 2 mounted at its forward end 3. uponthe usual axle 4 of the-front wheels 6. Theaxle is furnished with asuitable tow bar 1 for thetowingby a tractor, not shown. The rear end ofthe bowl is mounted on suitable brackets 8. mounted. upon rear axle 9carrying wheels I I. At the leading end of the bowl I is a bottomopening l2 with a. protective apron l3 extended over the opening l2,Along the rear of the bottom opening. I2 is provided a scraper blade Idwhich extends transversely across the width of the scraper bowl bottom[5. This scraper blade It extends on an incline downwardly and forwardlyand is fixed upon a cross bar It on the forward edge of a plate It whichin turn is supported on guides I! along the opposite side edges of thebowl I. On the plate I6 is pivoted a pair of; spaced, links 18 on pivotsI9 which links extend rearwardly under the bottom IS. The rear ends ofthe. links I8. are pivoted at 2i in the ends of lovers 22 which convergetoward the central plane of the bowl and. each of which is in turnpivoted on a stationary vertical pivot 23 mounted on. the bottom l5 ofthe bowl I. The center or inner ends of thelevers 22, are connected by apivot 24. to. an actuating bar 26 whichlatter at its. rear; end. ispivoted at.

27 to a generally vertical lever 28. This vertical lever 28 is in turnpivoted at about its middle on a horizontal pivot 3| to a bracket 32extending rearwardly from the bowl I.

The upper end of the vertical lever 28 has a follower roller 33 thereinwhich rides on the periphery of an eccentric cam 34 keyed on a shaft 36and rotated by suitable transmission mechanism 31. A coil spring 38 isconnected to the upper portion of the lever 28 and to the frame of thetransmission 31 and normally pulls the upper end of the lever 28 and itsroller 33 toward the cam 34. As the eccentric cam 34 is rotated theupper end of the lever 28 is rocked back and forth and rocks the bottombar 26 back and forth, rocking the levers 22 so that the outer ends ofthe latter move back and forth and pull the links I8 and the cross barI6 therewith. The blade It moves with the cross bar I6 back and forth.While the bowl I is advanced by a tractor in the usual manner, thisreciprocating movement causes the blade I 4 to impact against the hardground with a hammer action breaking the ground up under the bottomopening I2 and thereby allowing the broken ground to ride up on theapron bar I6 and load into the bowl I, to be carried away in the usualmanner.

In the modified form shown in Fig. 3 the entire bowl is reciprocated.The blade GI in this instance is a solid structure fixed on the bottomof the bowl I and is reciprocated with the bowl I. The upper end of thebowl in this instance is slidably mounted on a guide frame 32 whichforms part of the frame structure, which latter frame structure in turnis supported on front and rear axles substantially in the mannerheretofore described. On the rear end of the bowl I is a hollow guidebracket '53 in which is rotating an eccentric cam 44, the shaft 46 ofwhich is rotated by chain sprocket transmission t? from theaforementioned transmission means 31 heretofore described. As theeccentric cam 44 is rotated it moves the bowl I back and forth on itsguides and thus the entire bowl reciprocates back and forth while beingdrawn forwardly to utilize the breaking action of the forwardly anddownwardly inclined blade 4|.

In the modified form shown in Figs. 4, and 6 the general structure ofthe frame and its support as Well as the scraper bowl is the same asheretofore described. The difference is in the provision of atransversely reciprocating saw blade 5| which extends near the rear edgeof the bowl opening I2 and is supported on a wide cross bar 52, whichlatter in turn has elongated slots 53 near its opposite ends slidablyheld upon supporting bolts 54. The saw blade El and the cross bar 52 areshorter than the total width of the bowl bottom so as to provide spaceat each end thereof for reciprocation. The saw blade 5| is inclinedforwardly and downwardly, as shown in Fig. 5, so as to saw under andinto the dirt or hard ground and allow such ground to work up and oversaid blade and to load into the interior of the bowl. The hereinillustrative embodiment of the reciprocation of the cross bar and sawblade includes an eccentric cam 56 on a horizontal shaft 57, whichlatter is journalled in suitable journal brackets 58 extended downwardlyfrom the bottom of the bowl I. The eccentric cam 56 is in asubstantially vertical plane and is disposed between opposed abutmentflanges 59 on the cross bar 52 so that as the eccentric cam 56 isrotated it is in engagement with the abutment bar 59 and throws thecross bar back and forth transversely with respect to said bowl. The camshaft 51 is driven by suitable gear transmission 60 which is connectedby a drive shaft 63 to a gear transmission 6| of drive mechanism 62located on the frame of the structure. As the gear transmissions arerotated they rotate the cam 56 which reciprocates the saw blade back andforth as heretofore described.

In the embodiment shown in Fig. 7, the oscillation is accomplishedeccentrically from the opposite ends of the blade. In thi form thescraper blade is made in two sections 66, 61 which are pivotallyconnected atrtheir inner ends by a pivot pin 68 supported on the bottom69 of the bowl. These blades are again near to the rear edge of theopening I 2 in the bottom of the bowl. From the free end of each bladesection extends rearwardly a link II pivoted at one end to the outer endof the adjacent scraper blade section 66 or 61 and at its other end to arotating eccentric I2, the shaft I3 of which latter is driven in asuitable manner not shown from a drive mechanism. In this manner as theeccentric is rotated, the link II moves back and forth and thereby rocksthe blade sections 66, 61 forward and backward to the dotted lineposition and the full line position respectively, as shown in Fig. 7.

Another form of'applying the impact and scraping action of the bladesupon hard ground is shown in Fig. 8. In this form the outer ends ofblade sections I6 are pivoted on fixed pivots 11. The center portions ofthe blade sections 15 are freely pivoted together by a vertical pivot 18through which is journalled an end of a link 19. which link in turn isjournalled at its rear end 3I to an eccentric 82 the shaft of whicheccentric is driven in any suitable manner. Thus as the eccentric 82 isrotated, it rocks the link'IS back and forth and thereby pushes thecenter portion of the blade I6 forward and backward respectively as intothe dotted lines and into the full line positions shown in Fig. 8.

I claim:

1.In combination with a scraper bowl supported by a portable frame forscraping and loading ground, and having a loading opening, a scraperblade extended along the loading opening on the bottom of said bowl, ablade holder movably supported on the bottom of said bowl, and means toimpart rocking movement to said blade holder and said blade forloosening and loading the ground through said loading opening. saidholder comprising a reciprocating supportingelement, guides on saidbottom to support the reciprocating element, and a transmission deviceconnecting said reciprocating element to a reciprocating device, saidblade having a saw-like edge, said transmission device including arotating element extended along said bottom, an eccentric cam on saidrotating element, and abutments on said blade holder adjacent said camfor converting the rotating motion of said cam into reciprocatingmovement of said blade holder.

2. In combination with a scraper bowl supported by a portable frame forscraping and loading ground, and having a loading opening, a scraperblade extended along the loading opening on the bottom of said bowl, ablade holder movably supported on the bottom of said bowl, and means toimpart rocking movement to said blade holder and said blade forloosening and loading the ground through said loading opening, saidholder comprising a reciprocating supporting element, guides on saidbottom to support the reciprocating element, and a transmission deviceconnect-' 5 ing said reciprocating element to a reciprocating REFERENCESCITED device Said blade having saw'hke edge, 531d Thefollowing'references are of record in the transmission device includinga rotating element file f this patent; extended along said bottom, aneccentric cam on said rotating element, and abutments on said 5 UNITEDSTATES PATENTS blade holder adjacent said cam for converting Number NameDate the rotating motion of said cam into reciprocat- 261,339 Grove July18, 1882 ing movement of said blade holder, said blade be- 1,878,037Vodoz Sept. 20, 1932 ing inclined downwardly and forwardly with re-1,903,672 Hauge Apr. 11, 1933 spect to said bowl. 10 1,990,362 BakerFeb. 5, 1935 2,086,573 Osgood July 13, 1937 GEORGE MCINTOSH. 2,131,373Foster Sept. 27, 1938 2,443,492 Austin June 15, 1948

